/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package Servlet;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import DAO.Login_DAO;
/**
 *
 * @author phihai
 */
public class Servlet_Login extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            /* TODO output your page here. You may use following sample code. */
            String action = request.getParameter("action");
             
            if (action.equals("Login")) {
                
                String user = request.getParameter("uname");
                String pass = request.getParameter("pword");              
                int tmp;
                try
                {
                    Login_DAO lg = new Login_DAO();
                    tmp = lg.Login(user, pass);
                    out.println("<!DOCTYPE html>");
                    out.println("<html>");
                    out.println("<head>");
                    out.println("<title>Servlet NewServlet</title>");            
                    out.println("</head>");
                    out.println("<body>");                                   
                    if(tmp != -1)
                    {
                         out.println("<h1>Đăng nhập thành công</h1>");
                         request.getSession().setAttribute("username", user);
                         request.getSession().setAttribute("LoaiND", tmp);
                    }
                    else
                    {
                        out.println("<h1>Đăng nhập thất bại </h1>");
                    }
                    out.println("</body>");
                    out.println("</html>");
                    response.setHeader("Refresh", "2; URL=index.jsp");                   
                }
                catch(Exception ex)
                {
                    ex.printStackTrace();
                }      
            }
            else if (action.equals("Logout")) {
                 request.getSession().setAttribute("username", null);
                 request.getSession().setAttribute("LoaiND", null); 
                 response.sendRedirect("index.jsp");
            } 
        } finally {            
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
